diff options
Diffstat (limited to 'src/qt/bitcoinamountfield.cpp')
| -rw-r--r-- | src/qt/bitcoinamountfield.cpp | 257 |
1 files changed, 181 insertions, 76 deletions
diff --git a/src/qt/bitcoinamountfield.cpp b/src/qt/bitcoinamountfield.cpp index 25ad0c66af..6466039013 100644 --- a/src/qt/bitcoinamountfield.cpp +++ b/src/qt/bitcoinamountfield.cpp @@ -9,19 +9,186 @@ #include "qvaluecombobox.h" #include <QApplication> -#include <QDoubleSpinBox> +#include <QAbstractSpinBox> #include <QHBoxLayout> #include <QKeyEvent> -#include <qmath.h> // for qPow() +#include <QLineEdit> + +/** QSpinBox that uses fixed-point numbers internally and uses our own + * formatting/parsing functions. + */ +class AmountSpinBox: public QAbstractSpinBox +{ + Q_OBJECT +public: + explicit AmountSpinBox(QWidget *parent): + QAbstractSpinBox(parent), + currentUnit(BitcoinUnits::BTC), + singleStep(100000) // satoshis + { + setAlignment(Qt::AlignRight); + + connect(lineEdit(), SIGNAL(textEdited(QString)), this, SIGNAL(valueChanged())); + } + + QValidator::State validate(QString &text, int &pos) const + { + if(text.isEmpty()) + return QValidator::Intermediate; + bool valid = false; + parse(text, &valid); + /* Make sure we return Intermediate so that fixup() is called on defocus */ + return valid ? QValidator::Intermediate : QValidator::Invalid; + } + + void fixup(QString &input) const + { + bool valid = false; + qint64 val = parse(input, &valid); + if(valid) + { + input = BitcoinUnits::format(currentUnit, val, false, BitcoinUnits::separatorAlways); + lineEdit()->setText(input); + } + } + + qint64 value(bool *valid_out=0) const + { + return parse(text(), valid_out); + } + + void setValue(qint64 value) + { + lineEdit()->setText(BitcoinUnits::format(currentUnit, value, false, BitcoinUnits::separatorAlways)); + emit valueChanged(); + } + + void stepBy(int steps) + { + bool valid = false; + qint64 val = value(&valid); + val = val + steps * singleStep; + val = qMin(qMax(val, Q_INT64_C(0)), BitcoinUnits::maxMoney()); + setValue(val); + } + + StepEnabled stepEnabled() const + { + StepEnabled rv = 0; + if(text().isEmpty()) // Allow step-up with empty field + return StepUpEnabled; + bool valid = false; + qint64 val = value(&valid); + if(valid) + { + if(val > 0) + rv |= StepDownEnabled; + if(val < BitcoinUnits::maxMoney()) + rv |= StepUpEnabled; + } + return rv; + } + + void setDisplayUnit(int unit) + { + bool valid = false; + qint64 val = value(&valid); + + currentUnit = unit; + + if(valid) + setValue(val); + else + clear(); + } + + void setSingleStep(qint64 step) + { + singleStep = step; + } + + QSize minimumSizeHint() const + { + if(cachedMinimumSizeHint.isEmpty()) + { + ensurePolished(); + + const QFontMetrics fm(fontMetrics()); + int h = lineEdit()->minimumSizeHint().height(); + int w = fm.width(BitcoinUnits::format(BitcoinUnits::BTC, BitcoinUnits::maxMoney(), false, BitcoinUnits::separatorAlways)); + w += 2; // cursor blinking space + + QStyleOptionSpinBox opt; + initStyleOption(&opt); + QSize hint(w, h); + QSize extra(35, 6); + opt.rect.setSize(hint + extra); + extra += hint - style()->subControlRect(QStyle::CC_SpinBox, &opt, + QStyle::SC_SpinBoxEditField, this).size(); + // get closer to final result by repeating the calculation + opt.rect.setSize(hint + extra); + extra += hint - style()->subControlRect(QStyle::CC_SpinBox, &opt, + QStyle::SC_SpinBoxEditField, this).size(); + hint += extra; + + opt.rect = rect(); + + cachedMinimumSizeHint = style()->sizeFromContents(QStyle::CT_SpinBox, &opt, hint, this) + .expandedTo(QApplication::globalStrut()); + } + return cachedMinimumSizeHint; + } +private: + int currentUnit; + qint64 singleStep; + mutable QSize cachedMinimumSizeHint; + + /** + * Parse a string into a number of base monetary units and + * return validity. + * @note Must return 0 if !valid. + */ + qint64 parse(const QString &text, bool *valid_out=0) const + { + qint64 val = 0; + bool valid = BitcoinUnits::parse(currentUnit, text, &val); + if(valid) + { + if(val < 0 || val > BitcoinUnits::maxMoney()) + valid = false; + } + if(valid_out) + *valid_out = valid; + return valid ? val : 0; + } + +protected: + bool event(QEvent *event) + { + if (event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease) + { + QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event); + if (keyEvent->key() == Qt::Key_Comma) + { + // Translate a comma into a period + QKeyEvent periodKeyEvent(event->type(), Qt::Key_Period, keyEvent->modifiers(), ".", keyEvent->isAutoRepeat(), keyEvent->count()); + return QAbstractSpinBox::event(&periodKeyEvent); + } + } + return QAbstractSpinBox::event(event); + } + +signals: + void valueChanged(); +}; + +#include "bitcoinamountfield.moc" BitcoinAmountField::BitcoinAmountField(QWidget *parent) : QWidget(parent), - amount(0), - currentUnit(-1) + amount(0) { - nSingleStep = 100000; // satoshis - - amount = new QDoubleSpinBox(this); + amount = new AmountSpinBox(this); amount->setLocale(QLocale::c()); amount->installEventFilter(this); amount->setMaximumWidth(170); @@ -40,21 +207,13 @@ BitcoinAmountField::BitcoinAmountField(QWidget *parent) : setFocusProxy(amount); // If one if the widgets changes, the combined content changes as well - connect(amount, SIGNAL(valueChanged(QString)), this, SIGNAL(textChanged())); + connect(amount, SIGNAL(valueChanged()), this, SIGNAL(valueChanged())); connect(unit, SIGNAL(currentIndexChanged(int)), this, SLOT(unitChanged(int))); // Set default based on configuration unitChanged(unit->currentIndex()); } -void BitcoinAmountField::setText(const QString &text) -{ - if (text.isEmpty()) - amount->clear(); - else - amount->setValue(text.toDouble()); -} - void BitcoinAmountField::clear() { amount->clear(); @@ -63,16 +222,9 @@ void BitcoinAmountField::clear() bool BitcoinAmountField::validate() { - bool valid = true; - if (amount->value() == 0.0) - valid = false; - else if (!BitcoinUnits::parse(currentUnit, text(), 0)) - valid = false; - else if (amount->value() > BitcoinUnits::maxAmount(currentUnit)) - valid = false; - + bool valid = false; + value(&valid); setValid(valid); - return valid; } @@ -84,14 +236,6 @@ void BitcoinAmountField::setValid(bool valid) amount->setStyleSheet(STYLE_INVALID); } -QString BitcoinAmountField::text() const -{ - if (amount->text().isEmpty()) - return QString(); - else - return amount->text(); -} - bool BitcoinAmountField::eventFilter(QObject *object, QEvent *event) { if (event->type() == QEvent::FocusIn) @@ -99,17 +243,6 @@ bool BitcoinAmountField::eventFilter(QObject *object, QEvent *event) // Clear invalid flag on focus setValid(true); } - else if (event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease) - { - QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event); - if (keyEvent->key() == Qt::Key_Comma) - { - // Translate a comma into a period - QKeyEvent periodKeyEvent(event->type(), Qt::Key_Period, keyEvent->modifiers(), ".", keyEvent->isAutoRepeat(), keyEvent->count()); - QApplication::sendEvent(object, &periodKeyEvent); - return true; - } - } return QWidget::eventFilter(object, event); } @@ -122,18 +255,12 @@ QWidget *BitcoinAmountField::setupTabChain(QWidget *prev) qint64 BitcoinAmountField::value(bool *valid_out) const { - qint64 val_out = 0; - bool valid = BitcoinUnits::parse(currentUnit, text(), &val_out); - if (valid_out) - { - *valid_out = valid; - } - return val_out; + return amount->value(valid_out); } void BitcoinAmountField::setValue(qint64 value) { - setText(BitcoinUnits::format(currentUnit, value)); + amount->setValue(value); } void BitcoinAmountField::setReadOnly(bool fReadOnly) @@ -150,28 +277,7 @@ void BitcoinAmountField::unitChanged(int idx) // Determine new unit ID int newUnit = unit->itemData(idx, BitcoinUnits::UnitRole).toInt(); - // Parse current value and convert to new unit - bool valid = false; - qint64 currentValue = value(&valid); - - currentUnit = newUnit; - - // Set max length after retrieving the value, to prevent truncation - amount->setDecimals(BitcoinUnits::decimals(currentUnit)); - amount->setMaximum(qPow(10, BitcoinUnits::amountDigits(currentUnit)) - qPow(10, -amount->decimals())); - amount->setSingleStep((double)nSingleStep / (double)BitcoinUnits::factor(currentUnit)); - - if (valid) - { - // If value was valid, re-place it in the widget with the new unit - setValue(currentValue); - } - else - { - // If current value is invalid, just clear field - setText(""); - } - setValid(true); + amount->setDisplayUnit(newUnit); } void BitcoinAmountField::setDisplayUnit(int newUnit) @@ -181,6 +287,5 @@ void BitcoinAmountField::setDisplayUnit(int newUnit) void BitcoinAmountField::setSingleStep(qint64 step) { - nSingleStep = step; - unitChanged(unit->currentIndex()); + amount->setSingleStep(step); } |